%T Key Management for Secure Power SCADA
%A Manya K. Sleeper
%R Technical Report TR2008-628
%I Dartmouth College, Computer Science
%C Hanover, NH
%D June 2008
%U http://www.cs.dartmouth.edu/reports/TR2008-628.pdf
%X
This thesis proposes a key management protocol for secure
power SCADA systems that seeks to take advantage of the full security
capacity of a given network by allowing devices to use public key
cryptography for key management if they are capable of doing so and
reverting to symmetric key cryptography only when such use is
necessitated by the weakness of a given device. Allowing devices to
obtain different levels of security permits SCADA networks to maximize
their security in the decades before such networks are capable of
implementing fully public key-based key management protocols. Such a
system is obtained through the use of a protocol based on a modified
version of SSL using X.509 certificates containing encrypted symmetric
keys that allow master devices the option of using the symmetric keys for
encrypting the shared secret used to create keying material, instead of
using a slave device's public key. This thesis presents the protocol and
uses proof-of-concept code to carry out a performance evaluation of the
key management scheme.
%Z
Senior Honors Thesis. Advisor: Sean Smith.